/*
 * 		Author : Xerxes
 * 		Program: 
 * 		Created On : 01.10.2011 09:12:38 BDT
 *      "I have not failed, I have just found 10000 ways that won't work.
 * 
*/


#include <iostream>
#include <algorithm>
#include <vector>
#include <sstream>
#include <fstream>
#include <string>
#include <list>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <functional>
#include <bitset>

#include <ctime>
#include <cassert>
#include <cstdio>
#include <cmath>
#include <cstring>
#include <climits>
#include <cstring>
#include <cstdlib>

using namespace std;

#define VI vector< int >
#define CI( x ) scanf("%d",&x)
#define CL( x ) scanf("%lld",&x)
#define CD( x ) scanf("%lf",&x )
#define fo(i,st,ed) for(int i = st ; i < ed ; ++i )
#define foE(i,st,ed) for(int i = st ; i <= ed ; ++i )
#define foit(i, x) for (typeof((x).begin()) i = (x).begin(); i != (x).end(); i++)
#define bip system("pause")
#define Int long long
#define pb push_back
#define SZ(X) (int)(X).size()
#define LN(X) (int)(X).length()
#define mk make_pair
#define f first
#define s second
#define SET( ARRAY , VALUE ) memset( ARRAY , VALUE , sizeof(ARRAY) )
#define tp pair< int, pair<int,int> >
#define mmk( x, y , z ) mk( x, mk( y, z ) )

inline void wait( double seconds ){
    double endtime = clock()+( seconds* CLOCKS_PER_SEC );
    while( clock() < endtime ){
        ;
    }
}
int ntask,ndep;
vector< VI > need;
int incomming[105];
int vis[ 105 ] ;
VI P;
inline void Read(){
	SET( incomming, -1 );
	need.assign( ntask+5, VI() );
	fo(i,0,ndep){
		int father, child;
		scanf("%d %d",&father,&child);
		need[ child ].pb( father );
		incomming[ child ] = 1;
	}
}
inline void recur(int nw_node){
	
	if( vis[nw_node]==-1 ){
		vis[nw_node] = 1;
		VI need_ = need[nw_node];
		for(int i=0,j=SZ(need_); i<j; ++i ){
			recur( need_[i] );
		}
		P.pb( nw_node );		
	}
}
inline void Proc(){
	SET(vis, -1 );
	P.clear();
	foE(i,1,ntask){
		if( incomming[i]==-1  || vis[i]==-1 ){
			recur(i);
		}
	}
	printf("%d",P[0]);
	for(int i=1,j=SZ(P); i<j; ++i ){
		printf(" %d",P[i]);
	}
	printf("\n");
}
int main(){
    #ifndef ONLINE_JUDGE
        freopen("in","rt",stdin);
    #endif
    
    while( scanf("%d %d",&ntask, &ndep)==2 ){
		if( ntask==0 && ndep==0 )break;
		Read();
		Proc();
	}

return 0;
}


